JPS5994262A - Cassette tape recorder device - Google Patents

Abstract

PURPOSE:To obtain a cassette tape recorder device of simple constitution which can be miniaturized with easy handling by providing a switch mechanism which switches the tape traveling between forward and reverse directions and a control member which can have an engaging state between the 1st and 2nd rotors simultaneously with or in advance to an automatic stop operation carried out by a tape end detecting mechanism in a nonreverse mode. CONSTITUTION:A tape and detecting mechanism detects the end of a tape and turns a detection lever clockwise. A reverse driving lever 83 is guided to be hooked to a hook groove 846 at the other side while having a contact between a guide pin 832 and a guide part 844. Then the lever 83 presses a bent hooking part 387 or 388 of a reproduction slider 38 and moves the slider 38 toward an arrow E or F. Therefore the slider 38 actuates the 1st or 2nd switch slider 39 or 40 to switch the tape traveling to the forward or reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cassette tape recorder device intended for miniaturization.

[Technical background of the invention and its problems]

Recently, cassette tape recorders have become more compact and lightweight, making them suitable for carrying, and 2-way stereo types have become popular, especially for playback using headphones.
For example, you can enjoy playing Tezo while walking while wearing headphones. Such headphone-only portable cassette tape recorders have already been made as small as possible, and at present are approximately the same size as a cassette case that houses a tape cassette.

By the way, the next requirement for this type of miniaturized cassette tape recorder is to improve usability by organically connecting each mechanical part and adding an IJ parsing function and a recording function, as well as improving the power consumption. Power saving measures should be taken to reduce consumption.

However, it has been difficult to add the above-mentioned requirements to a cassette tape recorder that is intended for miniaturization because it has many disadvantages that impede miniaturization.

For example, cassette tape recorders that are designed to be more compact have a problem in that the number of mechanical parts increases, making the configuration more complex and larger. This was the biggest obstacle in adding it.

However, there is a need to promote miniaturization, control each mechanical part in an organic and efficient configuration, and to take power-saving measures to reduce power consumption and to make the device inexpensive.

[Object of the Invention] The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a very good cassette tape recorder device that has a simple structure, can be downsized, and is easy to use.

[Summary of the invention]

That is, the present invention includes a first rotating body that rotates independently of tape running, and a second rotating body that is engaged with the first rotating body so as to be able to transmit rotational force with a portion that is not engaged with the first rotating body. a rotating body,
an actuating member that takes first and second positions for causing the tape recorder mechanism to run in forward and reverse directions in conjunction with a tape end detection mechanism or a manual reverse operator; a cam portion having first and second locking portions for controlling the member in first and second positions; and a cam portion formed on the second rotating body and corresponding to the first and second locking portions. a first rotating body that rotates the second rotating body in a direction in which the second rotating body is engaged with the first rotating body in response to the operating force of the operating member;
and a second engaging portion, a switching mechanism that switches tape running between forward and reverse by engagement of the first and second rotating bodies, and an automatic stopping operation by the tape end detection mechanism in a non-reverse state at the same time. Alternatively, it is characterized in that it includes a control member that allows the first and second rotating bodies to engage in advance.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Figures 1(a) and (b) are, respectively,
1 shows a front and side view of a cassette tape recorder to which the present invention is applied. That is, 11
is a box-shaped cabinet that is approximately the same size as a cassette case that stores tape cassettes, and one plane part of this cabinet 11 is left as it is, and the cassette lid 1 is
2. The cassette lid 12 is then manually opened by the user through the central opening (A) in FIG. 1(b).

It is opened and closed by rotating in the direction (B), and is lightly locked in the open and closed positions and supported to prevent wobbling. Further, the cassette lid 12 has a cassette holder on its back surface, the details of which will be described later. This cassette holder is linked to the opening/closing operation of the cassette lid 12, and is capable of holding the tape cassette 13 shown by the dashed line in FIG.

Here, inside the cabinet 11 is the cassette lid 1.
There are provided a storage section 14 which can accommodate the tape cassette 13 in a closed state, and a mechanism storage section 15 in which a tape recorder mechanism section, which will be described later, is installed. Inside the cabinet 11, a recording/playback head (hereinafter referred to as a recording/playback head), an erasing head, a pair of right and left pinch rollers, etc. A head portion 16 having a head portion 16 is disposed. This head portion 16 is linked to the opening/closing operation of the cassette lid 12 together with the cassette holder.

As shown in FIG. 1 ( ), inside the storage section 14 are a pair of right and left reel hubs that are fitted into a pair of -6 reel hubs (not shown) of the tape cassette 13 and are driven to rotate in accordance with the running direction of the tape. Left reel axes 17, 18 are respectively arranged. The cassette lid 12 also has a fast-forward operator 19 located at a position facing the right and left reel shafts 17 and 18 on the tape winding side during fast-forwarding and rewinding (when the tape runs in the forward and reverse directions). A rewind operator 20 is provided respectively. These fast forward long rewind operators 1
9.20 is installed so as to be operable to press the rotating shafts 171, 181 of the right and left reel shafts 17.18 in the axial direction thereof.

The cassette lid 12 also has a stop operator 21, a playback operator 22, a recording operator 23, and a Manual reverse operator 2
4 is installed substantially perpendicular to the surface of the cassette lid 12 so as to be operable to suppress it. Further, a window portion 25 is provided approximately at the center of the cassette lid 12, and this window portion 25 is made of, for example, a transparent acrylic plate, and is a portion of the tape see-through window of the tape cassette 13. It is set up so that

Here, in the cassette lid 12, between the fast forward/rewind operators 19, 20 and the stop operator 21, there is a long hole 12 having an inclination that widens outward from the storage section 14 side. is formed. This elongated hole 121 is used for radio reception using a tuner back (not shown).

This is so that the channel selection operation can be performed with the lid 12 closed. That is, this cassette tape recorder is not only capable of simply playing back and recording tapes, but also can receive radio broadcasts using the Qina pack. This is used to receive radio waves, tune in,
This is accomplished by loading the above-mentioned tuner 4, which has a china circuit section for detecting, amplifying, etc. in a casing, into the storage section 14 instead of the tape cassette 13. When a desired broadcasting station is selected by operating the tuning dial provided on the tuner 4, the received radio waves are detected and amplified, and then passed through the connection terminal to the main amplifier circuit in the cassette tape recorder. It is used to listen to radio broadcasts by playing them through headphones. At this time, with the cassette lid 12 closed, the tuning dial of the tuner back is inserted through the elongated hole 121 and protrudes to the outside, so that the tuning operation can be performed without opening the cassette lid 12. .

Further, on the side of the cabinet 11 corresponding to the manual reverse operator 24, a number limit switch for setting reverse, which will be described later, is provided. Furthermore, a volume adjustment dial, a headphone jack, etc. (not shown) are provided on the side of the cabinet 11.

Here, FIG. 2 shows the overall appearance of the tape recorder mechanism section, head section 16, cassette holder, etc. installed in the mechanism storage section 15. That is, 26 is a main chassis of the tape recorder mechanism section, and the right and left reels 9, 9, 1, 7, and IF1 are supported to be rotatable and slidable in the axial direction. Further, the main chassis 26 is provided with a pair of right and left capstans 2'l and 2B, which are the rotation axes of the right and left flywheels to be described later, and the right and left reel shafts 17 and 18. Motors 29 and the like for rotational driving are supported, respectively. A cassette holder 30 is supported at one end of the main chassis 26 so as to be rotatable in the directions of arrows (4) and (B) in the figure.
The tape cassette 13 (Fig. 1(b)
Hold parts 30J, 302 are formed so as to sandwich both ends in the width direction of (see) in the thickness direction. Further, an upper recording/reproducing head 31 and an erasing head 32 are supported approximately at the center of the cassette holder 30, and a pair of right and left pinch rollers 33, 34 are supported so as to sandwich the recording/reproducing head 31 and erasing head 32. has been done. These right and left pinch rollers 33 and 34 are installed so that they can selectively approach and separate from the cloth and the left capstan 27 and 28 depending on the forward and reverse constant speed running of the tape, as will be described later. There is. Further, the cassette holder 30 supports the stop, play, record, and manual reverse operators 21, 22, 23, and 24 so as to be freely suppressable.

The cassette lid 1 is attached to the cassette holder 30.
2 (see Figure 1(,)(b)) is mounted upside down, and at this time, the stop/playback, recording, and manual reverse controls 21, 22, 23, 24 are protruded to the outside. It is used for external operations. Here, when the cassette lid 12 is opened, the cassette holder 30 is rotated in the direction of the arrow (g) in FIG. 2, and is brought into the state shown in FIG. 3. At this time, the above-mentioned stop, play, record and manual reverse operators 21, 22, 23
．． 24, the recording/reproducing head 31, the erasing head 32, the right and left pinch rollers 33 and 34 are moved together with the cassette holder 30.

Next, the configurations of the tape recorder mechanism section and head section 16 will be explained. That is, in FIG. 4, the cassette holder 30 (
A recording/reproducing head 3, an erasing head 32, right and left pinch rollers 33, 34, etc. supported by the recording/reproducing head 3 (see FIG. 2) are located.

Of these, a recording/reproducing head 31 and an erasing head 32 are supported by the cassette holder 30 via a disk chassis 35. Above is the head and arrow (C)
, (t))' and is rotatably supported. Further, a substantially central portion of the right pinch lever 36 is rotatably supported on the rotation shaft 351. The right pinch roller 33 is rotatably supported at one end of the right pinch lever 36 around the rotation shaft 351, and at the other end is a driving section 362 having an inclined section 361. is formed.

Here, one end of the head chassis 35 is locked to one side of the head chassis 35, and the other end is a torsion (not shown) that is wound around the rotation shaft 351 and locked to the cassette holder 30. It is urged to rotate in the direction of arrow (D) about a rotation axis 35 by a spring. The right pinch lever 36 is
It is urged to rotate in the direction of arrow (C) about the rotation axis 35 by a spring (not shown) that is engaged between the blade chassis 35 and the rotation shaft 35 .

Further, the head chassis 3 of the cassette holder 30
On the left side in FIG. 50, a left pinch lever 37 is installed at a position substantially symmetrical to the right pinch lever 36. The left pinch lever 37 is supported at its approximate center by a rotation shaft 371, and the left pinch roller 34 is rotatably supported at one end on the right side in the figure about the rotation shaft 37. At the same time, a drive section 373 having an inclined section 372 is formed at the other end on the left side in the figure.

The left pinch lever 37 is biased to rotate in the direction of arrow C) about the rotation shaft 37 by a spring 13 (not shown).

Here, a reproduction slider 38 is installed on the lower surface of the cassette holder 30 and is moved in the directions of arrows (E) and (F) corresponding to the tape running direction.

That is, shafts 260, 261, and 262 are implanted at the lower end of the main chassis 26 in the figure, and these shafts 2
60, 261, and 262 are inserted through long holes 380°, 381, and 382 formed in the reproduction slider 38, so that the reproduction slider 38 can freely slide in the directions of arrows (E) and (F). And this playback slider 3
8 has the above-mentioned cloth and a left pinch lever 36 on both ends thereof.
37 drive portions 362, 373, respectively.
384 is formed, and first and second engagement pieces that can be engaged with bent engagement portions 391 and 401 formed on first and second switching sliders 39 and 40, respectively, which will be described later. 385.386 are formed. Here, the protrusion 383°14-384 formed on the playback slider 38 connects the tip of the loaded tape cassette 13 (see Figure 1 ■)) and the center of rotation of the cassette holder 30 (see Figure 3). It is located between.

That is, when the playback slider 38 is slid in the direction of the arrow (with), the right and left pinch levers 36 and 37 are moved by the protrusion 383 on the right side in the figure to the inclined portion 361 of the right pinch lever 36d driving portion 362. The right pinch roller 33 is pressed against the right capstan 27 because it is rotated in the direction of arrow (C) against the biasing force. At this time, the left pinch lever 37 is rotated in the direction of the arrow Φ) by the biasing force of the spring because the protrusion 384 on the left side in the figure of the regeneration slider 38 is positioned at the tip of the inclined portion 372 of the drive section 373. The left pinch roller 34 is separated from the left capstan 28.

Furthermore, when the reproduction slider 38 is slid in the direction of the arrow (F), the left pinch roller 34 is pressed against the left capstan 28 and the right pinch roller 33 is pressed against the right capstan 28 by operating substantially in the opposite direction to that described above. It is separated from the stand 27.

In this way, the tip of the tape cassette 13 loaded with the right and left pinch Leno 4-36.37 and the cassette holder 3
The playback slider 38 is configured to be driven by a protrusion 3B3, 384 formed between the rotation center of the playback slider 38 and the center of rotation of the playback slider 38. For this reason, the right and left pinch levers 36 and 37 require less operating stroke, improving operability and preventing malfunctions when inserting the tape cassette 13.

As shown in FIG. 5, FIG. 6, and FIG. 7, a substantially U-shaped playback drive member 41 is installed at the left end of the head chassis 350 supported by the cassette holder 30. An engaging portion 41 extending from one end of the reproduction drive member 41 is engaged with one end of the upper F head P chassis 35 . The playback drive member 41 is attached to the end of the main chassis 30 under the cassette holder 30 with an arrow mark (
G) is rotatably supported in the direction.

Here, as described above, the playback operator 22 is disposed on the cassette holder 30 facing the playback drive member 41, and at one end of the playback operator 22 there is an operating shaft 22 that protrudes downward. will be extended. Further, a through hole 222 is formed at the other end of the playback operator 22, and this through hole 222 is formed at the other end of the playback operator 22.
22, a recording operation element 23 is inserted therethrough so as to be freely operable. This recording operator 23 has an operating shaft 231 extending from its lower surface substantially parallel to the operating shaft 221 of the playback operator 22, and each of these operating shafts 221, 231 is supported by a bearing supported by the cassette holder 3θ. It is inserted through and supported by the member 42.

Furthermore, the bottom surface of a first drive section 223 having a substantially conical shape is attached to the operation shaft 22 of the playback operation element 22 . The top of the first drive section 223 is connected to the top of a substantially conical second drive section 225 via a shaft 224, and the bottom surface of a portion 225 of the second drive 17 is connected to the regeneration drive member 41. It is opposed to the bottom part of. - The bottom surface of a first driving section 232 having a substantially conical shape is attached to the operating shaft 231 of the hero recording sound operating element 23. The top of the first drive section 232 is connected to the top of a substantially conical second drive section 234 via a shaft 233, and the bottom surface of the second drive section 234 is connected to one end of the regeneration drive member 41. It faces the bottom surface of the substantially U-shaped recording drive member 43 that is arranged in parallel. Then, the first driving section 232
can be engaged with an engaging portion 412 formed by bending an upper portion of one end of the regeneration driving member 41 . The recording drive member) 3 also includes an engaging portion 412 of the playback drive member 41.
A driving section 431 is formed at one end facing the recording slider 43 so as to be engageable with a bending engagement section 44 of a recording slider 44, which will be described later.

Here, the recording slider 44 is as shown in FIG.
This is omitted for the sake of illustration, and the details will be described later.

That is, suppose that the 18-now playback operator 22 is suppressed in the stopped state shown in FIG. Then, the bottom surface of the second drive section 225 of the playback operator 22 presses the bottom surface of the playback drive member 41, causing the playback drive member 41 to rotate in the direction of arrow (G).

Therefore, the engagement portion 411 of the playback drive member 41 rotates the head chassis 35 (see FIG. 4) as described above, brings the recording/playback head 31 into contact with the tape, and pinches the right and left sides. The rollers 33 and 34 are pressed against the right and left capstans 27 and 28 via tape. The playback operator 22 is locked at the operating position, and the locking mechanism will be described later.

It is also assumed that both the playback and recording controls 22 and 23 are suppressed as shown in FIG. 6 while recording is not being performed. Then, as shown in FIG. 8, the bottom surface of the second drive section 234 of the recording operator 23 presses the bottom surface of the recording drive member 43, causing the recording drive member 43 to rotate in the direction of arrow (G). . Therefore, the drive section 431 of the recording drive member 43 presses the recording slider 44 and is slid in the direction of arrow (6). Here, the recording slider 44 turns on a recording/playback switch (not shown) to put the circuit into a recording state, and also brings the erasing head 32 (see FIG. 5) into contact with the tape. In the operating position of the recording operator 23, the bottom surface of the first drive section 232 is connected to the playback drive member 41.
It is engaged with and locked by the engaging portion 412 of.

On the other hand, when the playback operator 22 is operated, the recording/playback head 31 is brought into contact with the tape as described above, and the right pinch roller 33 is pressed against the right capstan 27 via the tape. is to be done.

Here, the above-mentioned recording represents, for example, one-way recording only when the tape is running in the forward direction, and the details thereof will be described later.

Here, as shown in FIG. 4 again, the motor 29 is installed approximately at the center of the right side of the main chassis 26 in the drawing, and the motor 290 has a rotating shaft 29.
A small diameter pulley 45 is fitted. Furthermore, the aforementioned right and left flywheels 46.47 are rotatably supported at the lower end of the main chassis 26 in the figure, and these right and left flywheels 46.47 and the pulley 45 are rotatably supported.
A belt 49 is wound around the intermediate pulley 48 so that rotational force can be transmitted.

Here, the rotation axes of the cloth and the left flywheel 46 and 47 are the right and left capstans 27 and 28, respectively. Then, the above cloth and the left flywheel 4
6.47 are coaxially formed with gears 50.51 having small diameters.

Here, among the right and left reel shafts 17.18 provided approximately at the center of the main chassis 26, the left reel shaft 18, which is on the winding side when the tape runs in the reverse direction, is as shown in FIG. It is installed in the main chassis 26.

That is, the left reel shaft 18 is attached to the main chassis 26.
A through hole 263 is formed in the portion where the is attached.

21- A bearing member 53 having a substantially cylindrical shape and having a collar portion 531 with a larger diameter than the through hole 263 at the lower part of the figure is inserted into the through hole 263, and the peripheral edge of the through hole 263 and the collar portion 531 are inserted into the through hole 263. 531 is fixed. The left reel shaft 180 rotation shaft 181 is rotatably inserted into the bearing member 53.

Further, the portion of the rotating shaft 181 that protrudes above the bearing member 53 is inserted into the through hole 54 formed at the bottom of the bottomed cylindrical locking member 54, and then inserted into the reel cap 54.
5 is fitted. Here, this reel cap 55
is rotated integrally with the rotating shaft 181, but the locking member 54 is independent of the rotating shaft 181. A coiled spring 56 is interposed between the upper end of the bearing member 53 and the locking member 54, and is biased upward via the rotating shaft 181tri, the locking member 54, and the reel cap 55. has been done.

Furthermore, the lower end of the locking member 54 is formed with a pressing portion 542 and an engaging portion 543 that are inclined in a predetermined direction. Of these, the suppressing portion 542 is capable of engaging with an engaging portion 392 formed on the first switching slider 39, and the engaging portion 53 is capable of engaging with a lock slider to be described later. There is.

Further, the rotating shaft 1 protrudes below the bearing member 53.
A small-diameter gear 57 is fitted into the small-diameter portion of the partial groove 81 and the male 3, which is made slightly smaller in diameter. A large-diameter gear 58 is fitted into the lower end of the small-diameter gear 57 and is slidably provided in the axial direction with respect to the rotating shaft 18 . Here, this large diameter gear 58 is connected to the rotating shaft 18.
A coiled spring 59 is interposed between the washer 182 and the washer 182 attached to the lower end of the gear, so that it is biased upward and fitted with the small diameter gear 57. A driving portion 601 of a switching drive lever 60 rotatably supported by the main chassis 26 is engaged with the upper surface of the large-diameter gear 58, and the switching drive lever 6θ is rotated. Accordingly, the drive section 601 presses the large diameter gear 58 in the axial direction to release the engagement with the small diameter gear 57.

Here, as shown in FIG. 4 again, the main chassis 2
A shaft 264 is implanted in the intermediate portion between the left reel shaft 18 and the left flywheel 47 of No. 6. This axis 264
As shown in FIG. 8 again, a large-diameter gear 61 and a small-diameter gear 62 are rotatably supported. And, between the large diameter gear 61 and the small diameter left gear 62,
A substantially ring-shaped friction member 63 is interposed. A stop 64 having a substantially cylindrical shape and a collar 64 is fitted to the lower end of the small diameter gear 62 of the shaft 264. The collar 641 of this stop 64 The small diameter gear 62 is caused by the coiled spring 65 provided above.
The large diameter gear 61 is pressed through the friction member 63, and the large diameter gear 61 and the small diameter gear 62 are interlocked.

Here, the large diameter gear 61 is the left flywheel 4.
The small diameter gear 62 can mesh with the large diameter gear 58 of the left reel shaft 18. It is said that The large-diameter and small-diameter gears 61.62 are selectively meshed with the small-diameter and large-diameter gears 57.58 of the left reel shaft 18, respectively.
When the tape is running at a constant speed in the opposite direction, the small diameter gear 62 and the large diameter gear 57 of the left reel shaft 18 are meshed, and when the tape is rewinding, the large diameter gear 6 and the left reel shaft are in mesh with each other. Eighteen small diameter gears 58 are meshed with each other.

On the other hand, among the right and left reel shafts 17 and 18, the right reel shaft 17, which is on the winding side when the tape runs in the forward direction, is installed in the main chassis 26, as shown in FIG. That is, a through hole 265 is formed in the main chassis 26 at a portion where the right reel shaft 17 is attached. A bearing member 66 having a substantially cylindrical shape and having a flange portion 25-661 with a larger diameter than the through hole 265 at the lower part of the figure is inserted into the through hole 265.
The peripheral edge portion and the collar portion 661 are fixed to each other. and,
Inside the bearing member 66 is the rotating shaft 1 of the right reel shaft 17.
71 is rotatably inserted.

Further, the portion of the rotating shaft 171 that protrudes above the bearing member 66 is inserted into the through hole 671 formed at the bottom of the bottomed cylindrical locking member 67, and then inserted into the reel cap 671.
8 is fitted. Here, this reel cap 68
Although Fi is rotated integrally with the rotating shaft 171, the locking member 67 is independent of the rotating shaft 171. A coiled spring 69 is interposed between the upper end of the bearing member 66 and the locking member 67, and the rotating shaft 171 is attached upward through the locking member 67 and the reel cap 68. Forced.

Furthermore, a pressing portion 672 and an engaging portion 673 that are inclined in a predetermined direction are formed at the lower end portion of the locking member 67. Of these, the suppressing portion 26-672 is capable of engaging with the engaging portion 402 formed on the second switching slider 40, and the engaging portion 67
3 is capable of engaging with a lock slider which will be described later.

1, the rotating shaft i protrudes below the bearing member 66.
The diameter of the portion yi is made slightly smaller, and the smaller diameter gear 70 is fitted into this smaller diameter portion. A large-diameter gear 71 is fitted into the lower end of this small-diameter gear 70, and is provided to be slidable in the axial direction with respect to the rotating shaft 171. Here, this gear 7 with a large diameter is connected to the rotating shaft 17.
A coil-shaped spring 72 is interposed between the washer 172 attached to the lower end of the gear 1 and the gear 70 is biased upward, thereby fitting the gear 70 with the small diameter. A driving portion 73 of a switching 1 drive lever 73 rotatably supported by the main chassis 26 is engaged with the upper surface of the large diameter gear 71, and the switching drive lever 73 is rotated. As the gear moves, the drive section 73 presses the large diameter gear 71 in the axial direction to release the engagement with the small diameter gear 70.

Here, the right reel shaft 17 of the main chassis 26,
Shafts 266 and 267 are implanted midway between the shaft 264 and the shaft 264. A gear 74 is rotatably supported on the shaft 266, and this gear 74 meshes with the smaller diameter gear 62 of the shaft 264. The gear 74 meshes with the large-diameter gear 20 of the right reel shaft 17 when the tape is running at a constant speed in the forward direction, and rotates the right reel shaft 17 at a constant speed.

The gear 74 still slides in the axial direction when the large-diameter gear 71 of the right reel shaft 17 slides in the axial direction, details of which will be described later, when the right reel shaft 17 is pressed and the tape is running at a constant speed in the reverse direction. As a result, the mesh is released.

On the other hand, a gear 75 is rotatably supported on the shaft 267, and this gear 75 is connected to the large diameter gear 6 of the shaft 264.
It is meshed with 1. The gear 75Fi and the right reel shaft 17 are meshed with the small diameter gear 70 of the right reel shaft 17 in a suppressed state, thereby rotating the right reel shaft 17 at high speed.

Further, as shown again in FIGS. 4 and 9, a rotation shaft 268 is implanted in the intermediate portion between the cloth of the main chassis 26 and the left reel shaft 17.18. This rotation axis 26
8 is the abbreviated-shaped #l and second switching slider 3.
9.40 are supported in a stacked state so that they can rotate independently of each other. The engaging portion 392 is formed at one end of the first switching slider 39 and is inclined so as to face the pressing portion 542 of the left reel shaft 18 . A protruding suppressing portion 393 is formed. And this suppression part 3
Reference numeral 93 denotes a protrusion 7 formed on the other end of the switching drive lever 73 that is engaged with the large-diameter gear 71 of the right reel shaft 17.
32. Further, the first switching slider 39
At the other end, the bent engagement portion 39 is formed to correspond to the first engagement piece 385 of the reproduction slider 3829- as described above.

On the other hand, an engaging portion 402 is formed at one end of the second switching slider 40 and is inclined so as to face the pressing portion 672 of the right reel shaft 17, and also protrudes from the left reel shaft 18. A suppressing portion 40 is formed. and,
This suppressing portion 4θ3 is engaged with a protrusion 602 formed on the other end of the switching drive lever 60 that is engaged with the large-diameter gear 58 of the left reel shaft 18. Further, at the other end of the second switching slider 40, the bending engagement portion 401 is connected to the second engagement piece 386 of the reproduction slider 38, as described above.
It is formed correspondingly.

That is, the first and second switching sliders 39.40
is rotated in conjunction with the suppression operation of the left and right reel shafts 18 and 17 to control the tape running system to a high-speed running state, and also to slide the playback slider 38 when the auto-reverse mechanism is in operation, which will be described later. They are rotated in conjunction with each other to control the tape running system to a stable running state. For example, when the right reel shaft 17 is suppressed, the small and large diameter gears 70, 71 of the right reel shaft 17 move in the axial direction together with the rotating shaft 171, as shown in FIGS. 10 and 11. As the gear 7o slides, the smaller diameter gear 7o meshes with the gear 75, making it possible to rotate at high speed. At this time, the pressing portion 672 of the right reel shaft 17 presses the engaging portion 402 of the second switching slider 4o to rotate it counterclockwise in the figure. Here, the large diameter gear 58 of the left reel shaft 18
The switching drive lever 6o that engages with the second switching slider 4
It is pressed by the pressing part 403 of o and rotated. For this reason, the large diameter gear 58Fi is slid in the axial direction by the switching drive lever 60 to release the engagement with the small diameter gear 62.

Further, as shown in FIGS. 12 and 13, when the left reel shaft 18 is pressed, the small and large diameter gears 57 and 58 of the left reel shaft 18 move in the axial direction together with the rotating shaft 181. As the gear is slid, the smaller diameter gear 57 meshes with the larger diameter gear 61, making it possible to rotate at high speed.

At this time, the pressing portion 542 of the left reel shaft 18 presses the engaging portion 392 of the first switching slider 39 to rotate it clockwise in the figure. Here, the large diameter gear 71 of the right reel shaft 17
The switching drive lever 73 that engages with the first switching slider 3
It is pressed by the suppression part 393 of No. 9 and rotated. For this reason,
The large-diameter gear 71 is slid in the axial direction by the switching drive lever 73 to release the gear 74 from meshing with the gear 74.

Here, as shown in FIG. 14, when the regeneration slider 38 is slid most in the direction of the arrow, the second switching slider 4o moves its bending engagement portion 391 to the second position of the regeneration slider 38. The switching drive lever 60, which engages with the large-diameter gear 58 of the left reel shaft 18, is rotated counterclockwise in the figure by being biased by the engagement piece 386 of the left reel shaft 18, as shown in FIG. , its protrusion 6θ2 is pressed by the suppressing portion 403 of the second switching slider 4o and rotated.Therefore, the large diameter gear 58 is rotated by the switching drive lever 6.
It is slid in the axial direction with respect to the rotating shaft 181 by the drive unit 60) of θ, and the meshing with the small diameter gear 62 is released. On the other hand, the first switching slider 39 has its bent engagement portion 39 connected to the first engagement piece 385 of the reproduction slider 38.
Since the large-diameter gear 71 of the right reel shaft 17 is maintained in a meshing state with the gear 74, the right reel shaft 17 is allowed to rotate at a constant speed.

Further, as shown in FIG. 16, when the playback slider 38 is slid in the direction of
The switching slider 39 has its bent engagement portion 391 pressed by the first engagement piece 385 of the regeneration slider 38 and is rotated clockwise in the figure. At this time, as shown in FIG. 9, the switching drive lever 73 that engages with the large-diameter gear 71 of the right reel shaft 17 has its protrusion 732 pressed by the suppressing part 393 of the 133rd switching slider 39. It is rotated. Therefore, the large-diameter gear 71 is slid in the axial direction with respect to the rotating shaft 171 by the driving portion 731 of the switching drive lever 73, and the meshing with the gear 74 is released. On the other hand, since the bending engagement portion 401 of the switching slider 4o of yp, 2 is disengaged from the second engagement piece 386 of the reproduction slider 38, the large-diameter gear 58 of the left reel shaft 18 The left reel shaft 18 is maintained in mesh with the small diameter gear 62, and the left reel shaft 18 is allowed to rotate at a constant speed.

Also, as shown in FIG. 4 again, the main chassis 26
A rotation shaft 268 is installed approximately in the center of the , and a lock slider 76 and a switch slider 72 are rotatably supported on the rotation shaft 268 . Among these, the lock slider 76 includes the first drive section 223 of the playback operator 22, the engaging section 673, 543 of the cloth and left reel shaft 17.543, the drive section (not shown) of the stop operator 2, and , first to fifth engaging portions 761 to 765 that can be respectively engaged with the engaging portions 781 formed on the number-limiting slider 78 are formed to spread around the rotation shaft 269, which will be described later. ing. Further, the switch slider 77 is provided so as to be overlapped with the lock slider 76 in a substantially P [shape], and the switch slider 77 is provided so as to be overlapped with the lock slider 76 in a substantially P [shape].
3. Engaging portion 673 of the cloth and left reel shaft 17.18;
543, the first to fifth parts that can be engaged with the drive part of the stop operation element 21 and the engaging part 78 of the number of times limit slider 78)
Engaging portions 771 to 775 are formed. moreover,
A sixth retaining portion 776 is formed at the tip of the third retaining portion 773 of the switch slider 77 and engages with a switch (not shown) for supplying power to the motor 29. When the switch slider 77 is rotated counterclockwise in FIG. 4, the switch is turned on by the sixth engaging portion, and the motor 29 is rotationally driven. Further, the lock slider 76 and the switch slider 77 have protruding locking pieces 766 and 77.
7 is formed. And these protruding locking pieces 766
．． 777 and a predetermined position of the main chassis 260 with springs 79 and 80, the lock slider 76 and switch slider 77 are each urged to rotate clockwise in FIG. 4. Therefore, the first to fifth positions of the lock slider 76 and switch slider 77 are
The engaging parts 761 to 765 and the first to fifth engaging parts 7
71 to 775 are the first driving part 223 of the playback operator 22 and the engaging parts 673 of the right and left reel shafts 17 and 18, respectively.
, 543, is pressed by the drive part of the stop operator 21 and the engaging part 781 of the number limit slider 78.

In the above configuration, when the playback operator 22 is operated to play back a tape, the head chassis 35 moves as described above, and the recording/reproducing head 31 comes into contact with the tape, and the right and left pinch rollers 33 ,．． 94
Selectively tape through the right and left cazostan; 7
．． 28. At this time, the first driving part 223 of the playback operator 22 presses the first engaging parts 761, 771 of the lock slider 76 and switch slider 77, and the 4
It is rotated counterclockwise in the figure. Then, the regeneration operation element 22 is in the suppressing operation position so that the first engaging portion 761 of the lock slider 76 faces the bottom surface portion of the first driving portion 223. For this reason, the lock slider 76 is rotated clockwise in FIG. The playback operator 22 is locked. At this time, the switch slider 77 is
The engaging portion 771 is the first driving portion 223 of the playback operator 22.
4, the switch is turned on and the motor 29 is rotated clockwise in FIG. 4 as described above.

37- The right and left flywheels 46, 47 are then rotated counterclockwise and clockwise, respectively. At this time, when the reproduction slider 38 is slid in the direction of the arrow (E), the second switching slider 40 is moved to the fourth position as described above.
It is rotated counterclockwise in the figure. In this case, the rotational force of the left flywheel 47 is the gear 5, the large diameter gear and the small diameter gear 61, 62, the gear 74, and the large diameter gear 7 of the right reel shaft 17.
1 and the rotating shaft 171 to the reel cap 68 at a constant speed, and the tape is played back in the forward direction. Further, when the reproduction slider 38 is slid in the direction of arrow (F), the first switching slider 39 is rotated clockwise in FIG. 4 as described above. Therefore, the rotational force of the left flywheel 47 is applied to the reel cap 55 at a constant speed via the gear 5, the large diameter and small diameter gears 61, 62, the large diameter gear 58 of the left reel shaft 18, and the rotating shaft 181. The tape is transmitted in the reverse direction, and the tape is played back in the reverse direction.

Next, it is assumed that the tape fast-forwarding is stopped and the fast-forwarding operator 19 is depressed. Then, since the reel cap 68 of the right reel shaft 17 is pressed, the locking member 67 is slid in the axial direction against the biasing force of the spring 69. This movement of the locking member 67 in the axial direction is achieved by means of a lever in which its lower end abuts against the flange 66 of the bearing member 66. In this state, the engaging portion 623 of the locking member 67 engages the switch slider 77.
The 20th engaging portion 772 of the lock member 67 is pressed, the switch slider 77 is rotated counterclockwise in FIG. engaged. For this reason, the motor 29
The right reel shaft 17 is locked at the operating position when the switch for supplying power to the reel is turned on. At this time, as the right reel shaft 17 is suppressed,
By sliding the rotating shaft 171 in the axial direction,
The small diameter gear 70 fitted on the rotating shaft 171 is slid in the same direction as the large diameter gear 7. Therefore, the large diameter gear 71 is disengaged from the gear 74, and the small diameter gear 70 is meshed with the gear 75. Further, as the right reel shaft 17 is suppressed, the pressing portion 672 of the locking member 67 presses the engaging portion 402 of the second switching slider 40 as described above. The second switching slider 40 is rotated counterclockwise in FIG.

Therefore, in the second switching slider 40, the suppressing portion 403 presses the protrusion 602 of the switching drive lever 60 that engages with the large-diameter gear 58 of the left reel shaft 18 to rotate the switching drive lever 60. make it move. The large-diameter gear 58 is slid in the axial direction relative to the rotating shaft 181 by the drive portion 601 of the switching drive lever 60, and the small-diameter gear 6
2 is disengaged. Therefore, the rotational force of the left flywheel 470 is applied to the gear 51, the large diameter gear 61, and the small diameter gear 61.
62. The signal is transmitted at high speed to the reel cap 68 via the gear 75, the small-diameter gear 70 of the right reel shaft 17, and the rotating shaft 171, and fast-forwarding of the tape is performed.

It is also assumed that the rewind operator 20 is operated to suppress the tape rewind. Then, since the reel cap 55 of the left reel shaft 18 is pressed, the locking member 54 is slid in the axial direction against the biasing force of the spring 56. The locking member 54 is moved in the axial direction until its lower end comes into contact with the flange 531 of the bearing member 53. In this state, the engaging portion 543 of the locking member 54 presses the 30th engaging portion 773 of the switch slider 77, and the switch slider 77
The lock slider 7 is rotated counterclockwise in the figure.
The third retaining portion 263 of No. 6 is connected to the engaging portion 54 of the locking member 54.
3. Therefore, a switch for supplying electric power to the motor 29 is turned on, and the left reel shaft 18 is locked at the operating position. At this time, as the left reel shaft 18Fi is pressed, the rotating shaft 18 is slid in the axial direction, so that the small diameter gear 57 fitted on the rotating shaft 181 is moved. The large-diameter tooth 41 is slid in the same direction as the wheel 58. Therefore, the large diameter gear 58 separates from the small diameter gear 62, and the small diameter gear 58 separates from the small diameter gear 62.
7 is meshed with gear 6, which has a large diameter. Further, as the left reel shaft 18 is suppressed, the pressing portion 542 of the locking member 54 presses the retaining portion 392 of the first switching slider 39 as described above, thereby causing the first The switching slider 39 is rotated clockwise in FIG. For this reason, this first switching slider 39 has its pressing portion 39
3 presses the protrusion 732 of the switching drive lever 73 that engages with the large-diameter gear 71 of the right reel shaft 17 to rotate the switching drive lever 73. And this switching drive lever 7
The large-diameter gear 71d is slid in the axial direction with respect to the rotation shaft 121 by the drive unit 731 of No. 3, and is disengaged from the gear 74. Therefore, the rotational force of the left flywheel 47 is transmitted to the reel cap via the gear 51, the large and small diameter gears 61 and 62, the small diameter gear 57 of the left IJ-roll shaft 18, and the rotating shaft 18. The tape is transmitted to 55 at high speed, and the tape is rewinded to 42.

Here, a case will be described in which the stop operator 21 is operated in the above-described playback, fast-forwarding, and rewinding states. That is, as described above, the stop operator 21 is installed in the cassette holder 30 so as to be pressable, and the lower end of the stop operator 21 is provided with the stop operator 21 that can be engaged with the fourth engaging portion 764 of the lock slider 76. A driving section is formed.

In the playback, fast-forwarding, and rewinding states, each of the operating elements 22.19.2011''i is connected to the first to third engaging portions 761 to 7 of the lock slider 76 at the respective operating positions.
63, the first drive section 223 and the locking member 67s
The engaging portion 673° 543 of 54 is locked. Therefore, when the stop operator 21 is depressed, the fourth engaging portion 764 of the lock slider 76 is pressed by the driving portion of the stop operator 21, and the lock slider 76 is rotated counterclockwise in FIG. Therefore, the playback, fast forward, and rewind operators 22, 19, and 20 are respectively unlocked and put into a stopped state.

In this way, the tape running system is switched by the small and large diameter gears '10.11 and 57 of the right and left reel shafts 17.18.
．． 58 is configured to slide approximately perpendicularly to the main chassis 26. Therefore, each gear of the tape running drive system is supported in a position approximately parallel to the main chassis 26, so the meshing relationship of each gear is stable, the transmission of rotational force is efficient, and the number of parts is reduced, making it compact. It is possible to promote the development of

The first and second switching sliders 39 and 40, which change the running system to fast-forward and rewind states, are used to switch the running system in the playback mode, which reduces the number of parts and promotes downsizing. It is possible.

A tape end detection mechanism for detecting when the tape reaches the end in the above-described playback state will now be described. That is, as shown in FIG. 4 and FIGS. 17(a) and 17(b), a friction lever 8 is provided on the lower end surface of the small diameter gear 62.
One end of the groove is provided via a well-known friction mechanism.

The friction lever 81 is biased in the direction of rotation when the small diameter gear 62 is rotated.

The other end of the friction lever 8 has a long hole 811.
is formed, and a pin 82 protruding from the tip of one end of an oval-shaped detection lever 82 is loosely fitted into the elongated hole 811. The detection lever 82 is rotatably supported by a shaft 822 protruding from the main chassis 26 at its substantially central portion, and the inner portion of the base at one end is formed into the large-diameter gear 6. The cam part 611 is brought into contact with the side part of the cam part 611. A protrusion 823 is formed at the base of one end of the detection lever 82, and this protrusion 823 is connected to the curved movable wall 612 formed on the flat surface of the large-diameter gear 61. It is assumed that the guarantee is possible. Further, at the other end of the detection lever 82, first and second engaging portions 824 are provided.
, 825 are formed. Among these, the first retaining part 8
24 is capable of engaging with a bending engagement part 282 formed on the number-of-times limiting slider 78, which will be described later, and a second retaining part 825 is able to engage with a bending engagement part 282 formed on the reverse drive lever 83, which will be described later. It is configured to be able to engage with the joint portion 831.

That is, in the above-described tape playback state, the left flywheel 47 and the gear 51 are rotated clockwise in FIG.
is rotated counterclockwise in the figure. Therefore, the friction lever 81 is urged in the same direction by the rotational force of the gear 6 with the small diameter, and the detection lever 82 is also urged in the same direction about the shaft 822. At this time, the detection lever 8'2 has the shaft 822 because the inner side of its base comes into sliding contact with the cam part 61'1.
Since the oscillating motion is performed around , a stable tape running state at a constant speed is maintained. For example, when the tape reaches the end in the tape constant speed running state in the forward direction, the rotation of the right reel shaft 170 is stopped, and the large diameter gear 71, gear 74 of the right reel shaft 12 and The rotation of the small diameter gear 62 is stopped. Therefore, slippage occurs between the gear 62 with the smaller diameter and the gear 61 with the larger diameter. At this time, the rotation of the small-diameter gear 620 is stopped, so that no biasing force is applied to the friction lever 8 and the detection lever 82. On the other hand, as the large-diameter gear 6 continues to rotate, the cam portion 611 is also rotated. For this reason, the detection lever 8
2 indicates that the cam portion 611 rotates as the cam portion 611 rotates.
It is rotated clockwise in FIG. 4 about the shaft 822 by the length of the maximum diameter of 1 mm, and is stopped at that position. Then, as the large-diameter gear 6 rotates, the detection lever 82
The projection 823 is connected to the operating wall 612 of the large diameter gear 6.
Since it comes into contact with and is pressed, it is further rotated clockwise in FIG. At this time, the first and second engaging portions 824 and 825 of the detection lever 82 actuate the number of times limiting slider 78 and reverse drive lever 83, which will be described in detail later.

Further, even in the tape playback state in the reverse direction, the end of the tape is reliably detected in substantially the same manner as in the above-mentioned forward tape playback state, and the explanation thereof will be omitted here.

Next, an explanation will be given of an auto-reverse mechanism that reverses the tape running direction in response to the above-mentioned chip end detection mechanism in the tape playback state. That is, as shown in FIG. 4 again, a gear 50 is formed coaxially and integrally with the right flywheel 46. The rotational force of the motor 29 is transmitted to the gear 50 together with the right flywheel 46 via a belt 49, and the right flywheel 46 is connected to the right flywheel 46.
It is rotated at a constant speed in the counterclockwise direction in the figure, centering on 7f. A shaft 84 is installed on the left side of the gear 50 of the main chassis 26 in the figure, and a reverse drive gear 84 is rotatably supported on this shaft 841 so as to be able to mesh with the gear 50. ing. As shown in FIG. 18(a), this gear 84 has a pair of notches 842 and 843 formed at predetermined positions facing each other and which do not mesh with the gear 50. Further, a substantially disc-shaped guide portion 844 is protruded from one side of the gear 84, and this guide portion 844 has substantially V-shaped locking portions facing each other corresponding to the notches 842 and 843. Groove 1j45.846 is formed.

Furthermore, the locking groove 845 is provided on one side of the gear 84.
．． A protrusion 84 protruding in a substantially triangular shape opposite to 846
7,848 are formed. A cam portion 85 is formed on the upper surface of the guide portion 844, with a portion having a flat portion 851 and the other portion being curved in the shape shown in the figure.
5 is inserted into a substantially rectangular through hole 386 formed in the middle portion of the reproduction slider 38. Bent pressing parts 387 and 388 are formed in the through hole 386 so as to be able to engage with the maximum diameter part of the cam part 85, facing each other on both sides in the figure.

49- Here, an id pin 832 formed at one end of the foregoing Mars drive lever 83 is brought into contact with the guide portion 844. The reverse drive lever 83 has an intermediate portion rotatably supported by the main chassis 26, and is biased clockwise in the figure by a spring (not shown).

Further, the reverse drive lever 83 has the bent engagement portion 825 that can be engaged with the second engagement portion 825 of the detection lever 82 at the other end. The other end of the reverse drive lever 83 is engaged with the manual reverse operator 24, and is rotated counterclockwise in the figure in response to the operation of the manual reverse operator 24. ing.

That is, when the tape reaches its end in the tape playback state, the Chive end detection mechanism detects this as described above and rotates the detection lever 82 clockwise in FIG. 4. Therefore, in this detection lever 82, the second retaining portion 825 presses the bending locking portion 50-831 of the 17th-north Z-drive lever 83, and the reverse drive lever 83 is moved to the 18th-
Rotate counterclockwise in the figure as shown in Figure (a). At this time, the side pin 832 of the forward/goose drive lever 83 presses one side of the protrusion 842 of the gear 84, causing the gear 84 to rotate slightly clockwise in the figure. Therefore, this gear 84 is meshed with the gear 50 of the right flywheel 27 and rotated, as shown in FIG. 18(b). For this reason, the reverse drive lever 83 is
As shown in FIG. 18(d), the guide pin 832 is guided by the other protrusion 848 while slidingly contacting the guide portion 844, and is locked in the other locking groove 846 as shown in FIG. 18(d). At this time, the cam portion 85 of the gear 84 is rotated in the same direction as the gear 84 rotates, so that the reproduction slider 3
8 to move the playback slider 38 in the direction of the arrow (F) or (). Therefore, the playback slider 38 moves in the direction of the first or second switching slider 39.8. 4Off is operated as described above to switch between the forward and reverse tape running states.Here, the gear 84 is operated as described above.
When one of the gears 5.846 is opposed to the gear 5o of the right flywheel 27, its rotation is stopped.

Further, the reverse drive lever 83 is not operated only by the detection lever 82 described above, but is operated as shown in FIG.
As shown in a) and (b), the tape is rotated counterclockwise in the figure in conjunction with the operation of the manual reverse operator 24, and the tape running direction is switched in substantially the same manner as described above. It is.

Here, the manual reverse operator 24 is, for example, the first
Even if the suppression operation is continued as shown in FIG. 9(b), the guide bin 832 of the reverse drive lever 83 is locked to the other protrusion 848 of the gear 84 after the tape running direction has been switched once. This eliminates the need for continuous switching operations, which prevents malfunctions and improves usability.

The reverse drive gear 84 is started by the pressing force of the helical Δ-space drive lever 83 and then rotated by a half turn by the gear 5o of the right flywheel 27. Therefore, in order to start the gear 84f, there is no need to provide a starting member such as a spring, which reduces the number of parts and simplifies the configuration.

Further, since no biasing force is applied to the gear 84, its rotation is performed efficiently, so that the load on the motor 29 can be reduced, and power consumption can be reduced.

In addition, as shown in FIG. 20(a), the main chassis 2
At 6, a muting switch 86 is installed corresponding to the reverse drive gear 84 for performing muting when switching the tape running direction. That is, this muting switch 86 is installed corresponding to one side of the gear 84, and is electrically connected to a circuit section (not shown). The muting switch 86 has a movable contact 861 provided corresponding to one of the -53 projections 847 and 848 located on the side of the reverse drive lever 83 facing the guide bin 832. Therefore, when the gear 84 starts rotating as described above, the muting switch 86 contacts its movable contact 861 as shown in FIG. 20(b).
For example, when the protrusion 848 is pressed for several seconds to turn on, muting is performed in a circuit manner.

Here, the muting switch 86 is connected to the gear 8.
19(e) VC is turned off at the completion of the switching of the mechanism section which is carried out with the subsequent rotation of step 4.

In this way, the muting switch 86 is turned on directly by the reverse drive gear 84.

By configuring the switch to turn off, the operation can be performed reliably and the configuration can be simplified.

Further, the muting switch 86 is connected to the gear 84.
Since it is turned on by being suppressed by one of the protrusions 847 and 848 formed at 54, the timing can be adjusted very easily.

Here, as shown in FIG. 4 again, the main chassis 2
6, a shaft 783 is implanted in the lower left part of the figure. This shaft 783 has the cylinder 1 as shown in FIG.
An intermediate portion of the limit slider 28 is rotatably supported,
One end thereof protrudes from the side of the cassette holder 30 and serves as the number limit switch 87 (see FIG. 4).

Further, at the other end of the number-of-times limiting slider 78, there is provided a drive section 784 whose substantially central portion is rotatably supported. This drive portion 784 has the bending engagement portion 7 at one end.
82 is formed to be able to engage with the first engaging part 824 of the detection lever 82, and the engaging part 781 is formed at the other end to be able to engage with the fifth engaging part 765 of the lock slider 76. It is formed so that it can be engaged. Furthermore, an engaging portion 785 is formed on the number cylinder 1-limit slider 78 in correspondence with the recording slider 44;
Details regarding ``L'' will be described later.

Here, the number limit switch 87 is set by an arrow (7rF).
It can be slid freely in any direction. When the number of times limit switch 87 is slid in the direction of the arrow, the number of times limit slider 7 is slid as shown in FIG.
8 is rotated clockwise in the figure, and the bent engaging portion 782 and engaging portion 781 are connected to the first retaining portion 8 of the detection lever 82.
24 and the fifth retaining portion 765 of the lock slider 76. Further, as shown in FIG. 22(a), when the number of times limit switch 87 is slid in the direction of the arrow (F9), the number of times limit slider 78 is rotated counterclockwise in the figure, and its bent engagement portion 782 and Engagement part 78
1 faces the nineteenth engaging portion 824 of the detection lever 82 and the fifth engaging portion 765 of the lock slider 76, and is in an engageable state.

That is, when the tape reaches the end in the tape playback state, the detection lever 82 is operated and rotated clockwise in the figure as described above.

At this time, for example, when the number of times limit switch 87 is slid in the direction of arrow (p), as shown in FIG.
The first retaining portion 824 of No. 2 is slightly engaged and pressed to rotate the driving portion 784 slightly. However, if the engaging portion 781 of the number limit slider 78 is the opening, the fifth
Since the lock slider 76 is not opposed to the retaining portion 765 of the playback operator 22, the lock slider 76 is not rotated in the direction of releasing the first drive portion 2230 of the playback operator 22. At this time, the detection lever 82 has its second engaging portion 825
As described above, the tape running direction is switched by pressing the bending engagement portion 831 of the reverse drive lever 83.

Here, when the number of times limit switch 28 is slid in the direction of the arrow, when the tape reaches the end, the tape running direction is permanently switched.

In addition, when the number of times limit switch 78 is slid in the direction of arrow C), the bending engagement portion 782 of the number of times limit slider 78 moves to the second position of the detection lever 82, as shown in FIG. 22(a). It faces the retaining part 824. Therefore, as the detection lever 82 rotates clockwise in the figure, the bending engagement portion 782 of the number-limiting slider 78 is pressed as shown in FIG. 22(b).
is rotated counterclockwise in the figure. Here, the engaging portion 781 of the drive portion 784 is the fifth engaging portion 76 of the lock slider 76.
5 to rotate the lock slider 76 counterclockwise in the drawing, the first drive section 223 of the playback operator 22 is unlocked and brought to a stopped state. At this time, the detection lever 82 has its second retaining portion 825
In order to rotate the reverse drive lever 83 counterclockwise in the figure (same as described above), the tape running direction can be switched as described above.

In this way, by providing the tape end detection mechanism in the large diameter and small diameter gears 61 and 62, which selectively drive the right and left reel shafts 1'1.18f rotation according to the tape running direction, This makes it possible to ensure terminal detection, reduce the number of parts, and facilitate downsizing.

In the reproduction state, the tape running system is configured to be reversed when automatically stopped by the number limit slider 78. Therefore, when the playback operator 22 is operated again, playback is performed from the reversed state of the mechanical section, which eliminates the trouble of changing tape cassettes and makes changing operations easier.

Next, the control mechanism of the recording system, which has been omitted from FIG. 4 for convenience of illustration, will be explained in detail. That is, in FIG. 23, 44 is a recording slider that is slid as described above in conjunction with the suppression operation of the recording operator 23.

This recording slider 44 is connected to a shaft 442 implanted in the main chassis 26 and a shaft 84 on which the reverse drive gear 84 is supported (arrow IC).

ρ) is supported so as to be slidable in the direction. Further, at the bottom of the shaft 442 of the recording slider 44, there is an arrow Q)1.
An engaging portion 443 inclined in the direction is formed, and a retaining portion 785 of the mI recording number limit slider 78 is engaged with this engaging portion 443.

Further, a rotation shaft 445 is attached to the lower part of the shaft 841 of the recording slider 44.
One end of the recording control member 88 is rotatably supported by the recording control member 88 . A spring 89 is engaged between the recording control member 88 and the recording slider 44 so as to apply a biasing force to the recording control member 88 in the counterclockwise direction in the figure. Further, a protrusion 88 is formed at the other end of the recording control member 88, and this protrusion Ba1d is engaged with a notch engaging portion 44'6 formed in the recording slider 44. Further, a pressing engagement portion 882 is formed in the middle portion of the recording control member 88, and this pressing engagement portion 882 is engaged with a protrusion 849 formed on the reverse drive gear 84. Here, the protrusion 549tri is formed corresponding to the cam part 85 of the gear 84, and when the tape running system is in the reverse running state, the recording slider 4
4, the pressing engagement portion 882 of the recording control member 88
is engaged with.

By the way, the playback and recording operator 22
．． 23 together, the recording operator 2 will be activated as described above.
3, the recording slider 44 is slid in the direction of the arrow fc1, and the circuit section is brought into the recording state, and the erasing head 32 is brought into contact with the tape. On the other hand, the recording head 3 is brought into contact with the tape in conjunction with the playback operator 22, and the right pinch roller 33 is always pressed against the right capstan 27 through the tape, thereby performing one-way recording.

That is, when the traveling system is running in the reverse direction as shown in FIG. 23, when both the playback and recording controls 22 and 23tl are operated without recording as shown in FIG. 24(a), the recording slider 44 is slid in the direction of arrow 1c). At this time, the recording control member 88 is slid in the same direction, and the pressing engagement portion 882 of the recording control member 88 is engaged with the protrusion 849 of the gear 84, so that the protrusion 881 is inserted into the notch of the recording slider 44. It will be in a state where it is melted from the engaging part 446. Therefore, the gear 84 has a protrusion 849 that is connected to the spring 84.
Due to the biasing force, the pressing engagement portion 8 of the recording control member 88
82 and rotated slightly clockwise in the figure. Therefore, this gear 84 is shown in FIG. 24(b), (cl, (
As shown in d), it is meshed with the gear 50 of the right capstan 27 and rotated half a rotation, thereby putting the running system in the forward running state as described above.

On the other hand, when the recording slider 44 slides in the four directions indicated by the arrows ((), its engaging portion 443 presses the retaining portion 75 of the number limit slider 8 and rotates it in the clockwise direction. As described above, the number-of-times limiting slider 8 has its bent engagement portion 782 and engagement portion 781 connected to the first engagement portion 824 of the detection lever 82.
and is opposed to the fifth retaining portion 265 of the lock slider 26.

Therefore, as described above, when the tape reaches the end 62-, the detection lever 82 is rotated and the number of times limit slider 7 is rotated.
8, and the recording state is automatically stopped.

Furthermore, when the recording slider 44 is slid in the direction of the arrow (C) as described above while the tape running system is running in the forward direction, the recording control member 88 presses and engages the pressing engagement portion 882 of the gear 84. Since it does not face the portion 849, it is not engaged as described above. Therefore, when the recording control member 88 has its protrusion 881 engaged with the notch engaging portion 446 of the recording slider 44, the recording slider 44
and slide in the direction of arrow (C). Here, the gear 84 is maintained in a stable state without being subjected to the biasing force of the spring 89, and recording is performed here.

In this way, playback and recording operator 2
When 2.23 is operated together, for example, when the tape running system is running in the reverse direction, the reverse drive gear 8
4 is operated reliably, the vehicle is switched to the forward running state, and one-way recording is performed. Therefore, erroneous recording can be reliably prevented and usability can be improved.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a very good cassette tape recorder device that has a simple structure, can be downsized, and is easy to use.

[Brief explanation of drawings]

Figure 1 (&)? -1 A plan view showing a cassette tape recorder device according to an embodiment of the present invention, FIG.
Illustrated biography) Side 7. Fig. 2 is a perspective view showing the external appearance of the mechanism section, head part, and cassette holder in Fig. 1 (&), Fig. 3 is a perspective view showing the cassette holder in Fig. 2 in an open state, and Fig. 4
The figures are a plan view showing the configuration of the mechanical part of FIG.
6 is a perspective view showing the operating state of FIG. 5, and FIG. 7 is a perspective view of the operating state of FIG.
8 is a sectional view showing a part of FIG. 6, FIG. 9 is a sectional view showing the mechanical part of FIG. Figures 10 and 11 are a sectional view and a plan view, respectively, showing the fast forward running state of the mechanical part in Figure 1(a), and Figures 12 and 13 are Figure 1(a), respectively.
FIGS. 14 and 15 are a sectional view and a plan view showing the mechanism section of FIG. FIG. 16 is a plan view showing the mechanism section in FIG. 1(a) in a constant speed running state in the reverse direction, and FIGS. 17(a) and (b) are respectively shown in FIG. 1(a).
a) A plan view and a sectional view showing the tape end detection mechanism, and FIGS. 18(a) to cd) II′i, respectively.
FIGS. 19(a) and 19(b) are plan views showing the operation of the drive system of the reverse mechanism in FIG. 1(a), respectively. Figures 20 (a) and (e) are plan views showing the muting operation in Figure 1 (a), respectively, and Figures 21 (a) and (b) are the mechanical parts in Figure 1 (&), respectively. Plan view showing the operation in the Nosu/Coos state, 2nd
Figures 2 (a) and (b) are plan views showing the operation of the mechanism in Figure 1 (a) in an automatic stop state, respectively, and Figure 23 shows the recording system of the mechanism in Figure 1 (a). 24(a) to 24(d) are plan views showing the operation of FIG. 23, respectively. 1 piece 11...cabinet, 12...cassette lid, 13
...Tape cassette, 14...Storage section, 15...
Mechanism storage part, 16... Head part, 17... Right reel shaft, 18... EIJ-le axis, 19... Fast forward operator, 20... Rewind operator, 21...・Stop operator, 2
2... Playback operator, 23... Recording operator, 24...
・Manual reverse operator, 25...window section, 26...
・Main chassis, 27...Right capstan, 28・
...Left capstan, 29...Motor, 30...Cassette holder, 31...Recording/reproduction head, 32...Erasing head, 33...Right pinch roller, 34...Left pinch roller, 35... Head sheath, 36... Right pinch lever, 362... Drive unit, 37... Left pinch lever, 373... Drive unit, 38... Playback slider,
39...First switching slider, 40...Second switching slider, 4...Regeneration drive member, 42...Bearing member, 43... Recording drive member, 44...Recording slider, 45...Zori, 46...Right flywheel, 47...Left flywheel 66-1 E-wheel, 48...Intermediate pulley, 49...
Belt, 50...gear, 51...gear, 53...
Bearing member, 54... Lock member, 55... Reel cage, 56... Spring, 57... Small diameter gear, 58... Large diameter gear, 59... Spring, 60
...Switching drive lever, 6th...Large diameter gear, 62.
...Small diameter gear, 63...Friction part side, 64...Stopper, 65...Spring, 66...Bearing member, 67
... Lock member, 68 ... Reel cage, 69.
...Spring, 70...Small diameter gear, 71...Large diameter gear, 22...Spring, 73...Switching drive lever, 74...Gear, 75...Gear, 76...・・・
Lock slider, 77...Switch slider, 78...
・・Number of times limit slider, 79・・Spring, 80・
...Spring, 81...Friction lever, 82...Detection lever, 83...Reverse drive lever, 84...
Gear, 85...Cam portion, 86...Muting switch, 87...Number of times limit switch, 88...Recording control member, 89...Spring. 67- Figure 1 (a) (Figure 17 (a) (b) (b) 43 Figure 24 (b) (C) 8m Figure 24

Claims (1)

[Claims] A first rotating body that rotates independently of tape running; a second rotating body that has a portion that is not engaged with the first rotating body so as to be able to transmit rotational force; and a tape. an actuating member that assumes first and second positions for causing the tape recorder mechanism to move in forward and reverse directions in conjunction with an end detection mechanism or a manual reverse operator; and an actuating member formed on the second rotating body; to the first and second positions.
a cam portion having a locking portion, and a cam portion formed on the second rotating body to receive the actuation force of the actuating member corresponding to the first and second locking portions to operate the second rotating body. first and second engaging parts rotated in a direction to engage the first rotating body;
a switching mechanism that switches tape running between forward and reverse by engagement of the first and second rotary bodies; A cassette tape recorder device comprising: a control member capable of engaging a second rotating body.